The Apache HTTP server is is the world's most popular Web Server, powering nearly 400 million Web sites across the globe.
I played around with version 2.4 over the weekend. It brings numerous enhancements, making Apache ideally suited for cloud environments, including:
- lower resource utilization, better concurrency and async I/O support, bringing performance on par, or better, than pure event-driven Web servers like Nginx;
- dynamic reverse proxy configuration;
- more granular timeout and rate/resource limiting capability;
- more finely-tuned caching support, tailored for high traffic servers and proxies.
More details on the Apache Software Foundation blog and a list of all the new features in the Apache HTTP server documentation.